编程练习：输入一个数组，编写一个函数，使所有奇数位于数组的前段部分，所有的偶数位于数组的后段部分

 1 #!/usr/bin/env python3
 2 
 3 def ji_first_ou(ary):
 4         indexa,indexb = 0,len(ary)-1
 5         while indexa < indexb:
 6                 while ary[indexa] & 1 == 1 and indexa < indexb:
 7                         indexa += 1
 8                 while ary[indexb] & 1 != 1 and indexa < indexb:
 9                         indexb -= 1
10                 ary[indexa],ary[indexb] = ary[indexb], ary[indexa]
11         return ary
12 
13 if __name__ == "__main__":
14         a = [1,2,3,4,5,6,7,8,9,10]
15         print(a)
16         print(ji_first_ou(a))